Improved device for removing incrustations from steam-boilers



J. HARRISON, Jr. DEVICE FOR REMOVING INGRUSTATION FROM STEAM BOILERS.

No. 35,678. PatentdJ'une 24, 1862.

THE NORRIS PETERS cu, womurnoq WASNINGTON. ov c.

UNITED STATES PATENT OFFICE.

JQSEPTT HARRISON, JR, Ol PHILADELPHIA, PENNSYLVANIA.

IMPROVED DEVICE FORv REMOVING INCRUSTATIONS FROM STEAM-BOILERS--peciliealion fnnning part of Letters llatcnt-No. 35,678, dated June 34,18 2.

To all whom it may homem-v Be it known that [,Joscen HUHITSON, Jr., ofthe city of Philadelphia, in the Slate of Pennsylvania,now residingtemporarily in the city of Paris, in the llhnpire of France, haveinvented a new and useful improvement in the Mode of Removing Scale,Sediment, and other Deposits from the interior of Steam Boilers, andespecially from those constructed upon the plan for which Letters Patent01 the United States were issued to me on the 4th dayof October, in theyear 1859; and I do hereby declare that the following is a true andexact description of my said improvement, which will be betterunderstood by reference to the drawing accompanying this specificationas a part hereof.

The drawing; Figure 1, shows in section one of the units of my improvedboiler.

I take out the bolt used in holding the units together, as described inthe specification of my aforesaid Letters Patent, at any point where theboiler needs cleaniugaud. introduce into the noel: of the units a.wroughtiron or other metal tube, as snown in section in the drawing. Ata short distance from the end of the tube I cut a slot transverselythrough it. In this slot I place a piece of steel or iron, (1, about oneinch thick and as wide as the out side diameter of the tube. From acenter midway between theends and edges of this piece of steel l' bore ahole, I), and from the center of this hole Istrike a circle, fixing thelength of the piece, which is about one inch smaller than the largestinside diameter of the unit, the slot in the tube being made more thanone inch larger than the steel plate. Through the hole in the plate, andthrough corresponding holes in the tube, asteel pin is put,finishingeven at the ends with the outside of the tube. The plate a turns freelyon the pin to any point needed. Inside the tube, which is enlarged atthat point for the purpose, I place small connecting-links c, which passon each side of the plate (t, to thepoint d, where another hole is boredin the plate a. Through this hole and through corresponding holes in thelinks I put another steel pin, connecting the plate and links together,for the purpose hereinafter to be described. 'At the ends of the steelplate, in a mortise or mortises, I place the cutters e e one or more oneach end. The tube described may he of any length. to suit the number ofunits to be clcai'uJ-d, and if very long may be made in sections, forgreater facility of handling. The operation of the above arrangement isas follows:

\Yhcn the boiler is opened at any part for cleaning,the necks of theunits are first cleaned of deposit, so that the tube may pass throughthem. \Vhen the tube is in the unit,by drawing on the links 0, at thepoint f, in the direction of the arrow, the plate a turns upon itscenter I), causing the steel cutters to come in contact with the depositon the inside of the unit at 9. Now, if the tube is turned from the endoutside,eithcr by hand or other power, the cutters turning slowly on thecenter I), at the same time the interior of the unit will be cleaned ofdeposit with great certainty and facility, no matter how hard thedeposit may be.

In removing the deposi t, as above described, Iprefcr to commence at thefar ends of the row of units, if they are horizontal, or nearly so, andas fast as any one unit is cleaned of the deposit on its inside surface,so as to re more the powdered matter, I folio it up with a pipe nearlythe same size as the neck of the unit, this pipe having a flexible endwhich dips down to the bottom of the unit. By the application of a windfan or other means at the outside end of the pipe the powdered matter isdrawn 'out. If it should happen that it would he better to cutout thedeposit with the units filled or partly tilled with water, the powderedmatter can be drawn out with the water by a pump. \Vhen the units arevertical,the powdered matter falls of itself when the lower caps areoff.

The rod 13 may be used in combination with a rod in place of a tube, andthe cutters may be dispensed with. and the extremities of the bar a befashioned so as to act in cutting away the scale or sediment to beremoved. These modifications of form do not affect the principle of myinvention.

hat I claim as new, and desire to secure by Letters Patent, is-

The combination of the tube A with the rod B and the bar a, and thecutters E and E, whereby the cutters, which are to operate inside of asteam-chamber, may be introduced through an opening of asmaller diameterthan that of the chamber itself. A

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

\Vitnesses: .lnslllll HARRISON. Jr.

Lmwnmvn F. .lL-kR-RY, (.2120. Homes.

